NQB-420DWA-AN Datasheet, PDF (17/36 Pages) CUI INC – FULLY REGULATED ADVANCED BUS CONVERTERS

CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 17 of 36
Electrical Specification
12.45 V, 39 A / 462 W
T_P1, T_P3 = -40 to +90ºC, V_I = 40 to 60 V, sense pins connected to output pins unless otherwise specified under Conditions.
Typical values given at: T_P1, T_P3 = +25°C, V_I = 53 V, max I_O, unless otherwise specified under Conditions.
Additional C_out = 3.9 mF, Configuration File: 19010-CDA 102 0314/017
parameter
conditions/description
min
typ
max
units
input voltage range (V_I)
40
turn-off input voltage (V_Ioff)
decreasing input voltage
36
37
turn-on input voltage (V_Ion)
increasing input voltage
38
39
internal input capacitance (C_I)
18
output power (P_O)
0
efficiency (η)
50% of max I_O
max I_O
50% of max I_O, V_I = 48 V
max I_O, V_I = 48 V
96.7
95.7
96.8
95.6
power dissipation (P_d)
max I_O
21.0
input idling power (P_li)
I_O = 0 A, V_I = 53 V
2.8
input standby power (P_RC)
V_I = 53 V (turned off with RC)
0.4
default switching frequency (f_s) 0-100% of max I_O
133
140
output voltage initial setting
and accuracy (V_Oi)
T_P1 = 25°C, V_I = 53 V, I_O = 0 A
12.415
12.45
output adjust range (V_O)
see operating information
4.0
output voltage tolerance band
(V_O)
0-100% of max I_O
11.5
line regulation (V_O)
max I_O
31
load regulation (V_O)
V_I = 53 V, 0-100% of max I_O
500
600
load transient voltage deviation V_I = 53 V, load step 25-75-25% of max I_O, di/dt =
(V_tr)
1 A/μs
±0.4
load transient recovery time
(t_tr)
V_I = 53 V, load step 25-75-25% of max I_O, di/dt =
1 A/μs
150
ramp-up time (t_r) - (from
10−90% of V_Oi)
10-100% of max I_O, T_P1 = 25ºC, V_I = 53 V
23
start-up time (t_s) - (from V_I
connection to 90% of V_Oi)
10-100% of max I_O, T_P1 = 25ºC, V_I = 53 V
39
V_I shut-down fall time (t_f) -
max I_O
3
(from V_I off to 10% of V_O)
I_O = 0 A, C_O = 0 mF
7
RC start-up time (t_RC)
max I_O
27
RC shut-down fall time (t_RC) -
max I_O
4.5
(from RC off to 10% of V_O)
I_O = 0 A, C_O = 0 mF
7
output current (I_O)
0
current limit threshold (I_lim)
V_O = 10.8 V, T_P1, T_P3 < max T_P1, T_P3
41
44
short circuit current (I_sc)
T_P1 = 25ºC, see Note 1
14
recommended capacitive load
(C_out)
T_P1 = 25ºC, see Note 2
0.1
3.9
output ripple & noise (V_Oac)
See ripple & noise section, max I_O , see Note 3
50
over voltage protection (OVP) T_P1, T_P3 = 25°C, V_I = 53 V, 10-100% of max I_O
15.6
sink current (note 4), see operating information
remote control (RC)
trigger level, decreasing RC-voltage
2.6
trigger level, increasing RC-voltage
2.9
Note
1: OCP in hic-up mode
2: Low ESR-value
3: C_out = 100 µF, external capacitance
4: Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.
60
38
40
462
30.5
147
12.485
13.2
12.7
60
700
39
47
6
110
0.7
V
V
V
μF
W
%
%
%
%
W
W
W
kHz
V
V
V
mV
mV
V
µs
ms
ms
ms
s
ms
ms
s
A
A
A
mF
mVp-p
V
mA
V
V
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